Partial reinforcement schedules occur in a variety of environments both natural and man-made—they may be purposefully devised or be merely coincidental. There are differences in rates of extinction produced by CRF (relatively rapid) and PRF (relatively slow) schedules of reinforcement. Explain how resistance to extinction (slow extinction) is adaptive for wild animals (and maybe humans too)—how does this better enable them and us to survive?
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Biology, 21.06.2019 15:00
Choose a mutation from those in model 2 that would be neutral for a cell. explain your reasoning by relating the mutation to the cellular respiration process.
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Biology, 21.06.2019 20:00
Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution
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Biology, 21.06.2019 22:20
Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?
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Partial reinforcement schedules occur in a variety of environments both natural and man-made—they ma...
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